Event starts at 12:06. The Smithsonian broke ground for its 19th museum, the National Museum of African American History and Culture, Wednesday, Feb. 22, 2012 in an invitation-only ceremony on the National Mall. President Barack Obama spoke at the ceremony. Other honored guests included First Lady Michelle Obama, former First Lady Laura Bush, Rep. John Lewis (D-Ga.) and Gov. Sam Brownback (R-Kan.). The ceremony took place on the museum's five-acre site adjacent to the Washington Monument at 14th Street and Constitution Avenue N.W. nmaahc.si.edu/